Knee Replacement Questions?

Discover new, game-changing technologies that can help you start living your full life again—a more normal feeling knee,1 a smoother recovery2,3 and implants built to last.

Official joint replacement
technology of the
Pro Football Hall of Fame

The Ultimate Knee Replacement Experience

See how knee replacement has changed—and what it can do for you.

Robotics
Designed for you

With 3D digital modeling from the CORI◊ Surgical System you get a surgical plan that’s customized to your unique anatomy. That means your surgeon can perform your procedure more efficiently and accurately than traditional knee replacement surgery.

Robotics-assisted Surgery

The latest innovation from Smith+Nephew is our handheld robotics-assisted technology for partial and total knee replacements. This advanced technology enables your surgeon to plan and perform your surgery with a greater degree of accuracy than is possible with traditional methods.9

A unique plan

Your knee replacement surgery is as unique as you are. After all, it is the only one that’s based on the combination of your individual knee anatomy and the specific implant your surgeon has determined is right for you. To help ensure your implant is positioned and aligned correctly to your anatomy, the CORI◊ Surgical System creates a customized 3D digital model of your knee. This three-dimensional view helps your surgeon choose the right implant for you. In addition, the 3D digital model eliminates the need to get a CT scan of your knee before your surgery, which reduces your exposure to harmful radiation.

A natural fit

The benefits of robotics-assisted surgery is about more than just a detailed 3D view of your knee. The CORI◊ Surgical System also helps ensure your procedure is performed as the surgeon planned it, giving you the benefits of enhanced accuracy when compared to traditional knee surgery. Accuracy is important because it not only helps the implant function as intended, it also helps avoid uneven wear which can shorten the longevity of an implant.

More implant options

Unlike other robotics platforms, our system works with all of our partial and total knee implants – including those made from our exclusive VERILAST Technology for added durability. This wide selection allows your surgeon to choose the right implant for you.

Higher patient satisfaction—Smoother recovery4,5,6

The JOURNEY◊ II Knee System has been demonstrated to improve a patient’s range of motion more quickly after surgery. This faster recovery, along with the implant’s normal pattern of motion, have been shown to lead to high levels of patient satisfaction.

What Is JOURNEY◊ II Technology?

The JOURNEY II AKS Difference

One of the most remarkable breakthroughs in design of total knee replacements has been the creation of the JOURNEY II Active Knee Solutions. Designed using the latest in human simulation software, and built using some of the most wear-resistant materials available, this unique implant was designed to address two of the most common concerns associated with knee replacement implants: implant wear and implant feel.

Commonly described as a hinge joint, your knees actually do much more than simply swing back and forth. In fact, every time your knee bends, forces in and around the joint work together to produce a subtle and complex rotational movement that you don’t even realize is there. However, if this rotational movement is removed, the change can be felt in the muscles and ligaments through the entire leg.

An implant built to last

With Smith+Nephew knee implants, your surgeon has access to OXINIUM◊ Oxidized Zirconium. This unique metal alloy is designed to reduce the effects of implant wear and tear. In fact, OXINIUM knee implants have been lab-tested for durability 9-times longer than the international standard for joint replacements7.

What is OXINIUM◊ Oxidized Zirconium?

If it is determined that an implant made with VERILAST◊ technology is right for you, the femoral – or thighbone portion – of your implant will be made from OXINIUM Oxidized Zirconium – a patented and award winning ceramicised metal alloy that Smith+Nephew spent more than a decade developing.

During manufacture, OXINIUM implants undergo a process that transforms the implant’s surface into a hard, ceramicised metal – while still retaining all of the durability of the underlying metal. In addition to being more durable than a true ceramic, this metal implant’s ceramicised surface is more than twice as hard and therefore twice as resistant to the kind of scratching that can cause a cobalt chrome implant to wear out before its time.10


Doctor Image

Michael Held, MD


Find on Map Call Doctor Visit Website

A specially trained knee replacement surgeon, Dr. Michael Held uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame to deliver the options patients in the greater Greenwich, CT demand. Dr. Michael Held uses hand-held CORI Robotics-assisted knee replacement to deliver personalized surgical planning to patients in the greater Greenwich, CT area.

See Other Locations


Doctor Image

Samuel Laurencin, MD


Find on Map Call Doctor Visit Website

Dr. Samuel Laurencin is a knee replacement specialist delivering care to patients in Waterbury, CT and surrounding areas. A specially trained knee replacement surgeon, Dr. Samuel Laurencin uses hand-held CORI Knee Technology to deliver personalized knee surgery to patients in Waterbury, CT and surrounding areas. Dr. Laurencin uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Durgesh Nagarkatti, MD


Find on Map Call Doctor Visit Website

Dr. Durgesh Nagarkatti serves Glastonbury, CT, Rocky Hill, CT, Farmington, CT, Hartford, CT and surrounding areas with knee replacement expertise. Dr. Durgesh Nagarkatti is a knee replacement surgeon who uses hand-held CORI Knee Technology to deliver advanced surgical technology to patients throughout the greater Glastonbury, CT, Rocky Hill, CT, Farmington, CT, Hartford, CT area. Dr. Nagarkatti uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

James Walsh, DO


Find on Map Call Doctor Visit Website

Dr. James Walsh is a knee replacement surgeon serving Middletown, CT, Hebron, CT and surrounding areas. Dr. Walsh uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Ilda Molloy, MD


Find on Map Call Doctor Visit Website

Dr. Ilda Molloy serves New Haven, CT, Milford, CT and surrounding areas with knee replacement expertise. Dr. Ilda Molloy uses hand-held CORI Robotics-assisted knee replacement to deliver personalized surgical planning to patients in the greater New Haven, CT, Milford, CT area. Dr. Molloy uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Peter Hughes, MD


Find on Map Call Doctor Visit Website

Dr. Peter Hughes is a knee replacement specialist delivering care to patients in Stamford, CT and surrounding areas. Dr. Hughes uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Elie Mansour, MD


Find on Map Call Doctor Visit Website

Knee replacement specialist Dr. Elie Mansour offers a variety of knee replacement options to patients in the greater New Haven, CT area. CORI Knee Technology helps Dr. Elie Mansour deliver quality care with state-of-the-art robotics-assisted surgical techniques to patients in New Haven, CT and surrounding areas. Dr. Mansour uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Mark Shekhman, MD


Find on Map Call Doctor Visit Website

Dr. Mark Shekhman combines the advanced technologies and implant options today's knee replacement patients demand. CORI Knee Technology helps Dr. Mark Shekhman deliver quality care with state-of-the-art robotics-assisted surgical techniques to patients in Hartford, CT, Farmington, CT, Glastonbury, CT, Rocky Hill, CT and surrounding areas. Dr. Shekhman uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Adam Driesman, MD


Find on Map Call Doctor Visit Website

A specially trained knee replacement surgeon, Dr. Adam Driesman uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame to deliver the options patients in the greater Fairfield, CT, Bridgeport, CT demand.

See Other Locations


Doctor Image

Michelle Mariani, MD


Find on Map Call Doctor Visit Website

Dr. Michelle Mariani combines the advanced technologies and implant options today's knee replacement patients demand. Dr. Michelle Mariani uses hand-held CORI Robotics-assisted knee replacement to deliver personalized surgical planning to patients in the greater Waterbury, CT, Meriden, CT area. Dr. Mariani uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Henry A. Backe, MD


Find on Map Call Doctor Visit Website

A specially trained knee replacement surgeon, Dr. Henry Backe uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame to deliver the options patients in the greater Fairfield, CT demand. Dr. Henry Backe is a knee replacement surgeon who uses hand-held CORI Knee Technology to deliver advanced surgical technology to patients throughout the greater Fairfield, CT area.

See Other Locations


Doctor Image

Frank J Pompo, MD


Find on Map Call Doctor Visit Website

Dr. Frank Pompo combines the advanced technologies and implant options today's knee replacement patients demand. Dr. Frank Pompo uses hand-held CORI Robotics-assisted knee replacement to deliver personalized surgical planning to patients in the greater Torrington, CT, Bristol, CT area. Dr. Pompo uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Robert E Kennon, MD


Find on Map Call Doctor Visit Website

Dr. Robert Kennon serves Middlebury, CT, Meriden, CT and surrounding areas with knee replacement expertise. Dr. Kennon uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

John M Keggi, MD


Find on Map Call Doctor Visit Website

Knee replacement specialist Dr. John Keggi offers a variety of knee replacement options to patients in the greater Middlebury, CT, Meriden, CT area. Knee replacement surgeon Dr. John Keggi offers advanced surgical technology to patients in the greater Middlebury, CT, Meriden, CT area thanks to the hand-held CORI Robotics-assisted surgical system. Dr. Keggi uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Lee Bloom, MD


Find on Map Call Doctor Visit Website

A specially trained knee replacement surgeon, Dr. Lee Bloom uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame to deliver the options patients in the greater Middletown, CT demand. Dr. Lee Bloom has been trained on CORI Knee Technology and uses hand-held robotics-assisted surgery to deliver the highest quality care.

See Other Locations


Doctor Image

Brendan Comer, MD


Find on Map Call Doctor Visit Website

Dr. Brendan Comer combines the advanced technologies and implant options today's knee replacement patients demand. Dr. Brendan Comer is a robotics knee replacement specialist using CORI Knee Technology to deliver personalized surgical planning to patients throughout the greater Meriden, CT, Wallingford, CT area. Dr. Comer uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

David Hergan, MD


Find on Map Call Doctor Visit Website

Dr. David Hergan serves Middletown, CT, Westbrook, CT and surrounding areas with knee replacement expertise. A specially trained knee replacement surgeon, Dr. David Hergan uses hand-held CORI Knee Technology to deliver personalized knee surgery to patients in Middletown, CT, Westbrook, CT and surrounding areas. Dr. Hergan uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Matthew Rogell, MD


Find on Map Call Doctor Visit Website

Knee replacement specialist Dr. Matthew Rogell offers a variety of knee replacement options to patients in the greater Danbury, CT area. Dr. Rogell uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Doctor Image

Michael J. Kaplan, MD


Find on Map Call Doctor Visit Website

Dr. Michael Kaplan combines the advanced technologies and implant options today's knee replacement patients demand. Dr. Michael Kaplan has been trained on CORI Knee Technology and uses hand-held robotics-assisted surgery to deliver the highest quality care. Dr. Kaplan uses Smith+Nephew implants and technologies, the official Joint Replacement Partner of the Pro Football Hall of Fame.

See Other Locations


Looking for surgeons who offer CORI Robotics-assisted knee surgery outside of Connecticut? Click here to find a surgeon near you.

How bad is your knee pain?

Answer these common, multiple choice questions to help your doctor better understand your knee pain.

Section 1 of 3

1. Which knee is causing you problems?
2. How would you describe your knee pain?

Section 2 of 3

Section 3 of 3


Most important:
Next most important:
Third most important:
Fourth most important:

You're almost done!

Print out your results

You can print your assessment answers by clicking the "Print Results" button below. A separate window will open to display your answers. Print these out and click the Find a physician button to find a physician near you. If you do not see your results, please ensure you do not have pop-up blockers enabled for this site.

A unique plan

Your knee replacement surgery is as unique as you are because it’s the only one that combines your knee’s anatomy with the specific implant your surgeon chooses for you. As a result, your surgery requires an individualized surgical plan to help ensure your implant is positioned and aligned correctly for your anatomy. With robotics-assisted surgery, your surgeon uses the CORI◊ Surgical System to create a customized 3D digital model of your knee. This three-dimensional view helps your surgeon finalize and verify the right size implant for you and create a detailed surgical plan for how your replacement will be placed in order to optimize movement and function. As an added benefit, the 3D digital model eliminates the need to get a CT scan of your knee before your surgery, which reduces your exposure to harmful radiation.

Yes – you can.

It’s time to stop settling and start getting on with your life. You can take the stairs.*8 You can go for walks. You can stop being afraid. You can – with the ultimate knee replacement experience.

Learn More
VISIONAIRE
Anatomy And Function Of The Knee

The knee joint is the point at which the femur bone of the thigh meets the tibia bone of the lower leg. All the components of the knee – bones, cartilage, synovial membrane, ligaments, tendons and muscles – must work together properly for the knee to move smoothly.

VISIONAIRE
How To Talk To Your Doctor About Joint Pain

When talking to a doctor about your joint pain, it’s important to describe your symptoms clearly to make sure everyone involved is on the same page.

VISIONAIRE
Rheumatoid Arthritis of the Knee

For reasons no one fully understands, in rheumatoid arthritis, the immune system – which is designed to protect our health by attacking foreign cells such as viruses and bacteria – instead attacks the body’s own tissues, specifically the synovium, a thin membrane that lines the joints.

The information listed on this site is for informational and educational purposes and is not meant as medical advice. Every patient’s case is unique and each patient should follow his or her doctor’s specific instructions. Please discuss nutrition, medication and treatment options with your doctor to make sure you are getting the proper care for your particular situation.

◊ Trademark of Smith+Nephew. The information on this site is intended for US residents only © 2026 Smith+Nephew
Smith+Nephew Facebook Page | Follow Smith+Nephew on Twitter | Privacy & Cookies | Terms of Use

References

*Journey II BCS.

  1. Hall, et al. Unicompartmental knee arthroplasty (alias uni-knee): an overview with nursing implications. Orthopaedic Nursing. 2004;23(3):163-171. Accessed April 25, 2019.
    • Based on pre-surgical pain levels in UKA patients.
  2. Mayman DJ, Patel AR, Carroll KM. Hospital related clinical and economic outcomes of a bicruciate knee system in total knee arthroplasty patients. Poster presented at: ISPOR Symposium; May 19-23, 2018; Baltimore, Maryland, USA.
  3. Nodzo SR, Carroll KM, Mayman DJ. The Bicruciate Substituting Knee Design and Initial Experience. Techniques in Orthopaedics. 2018;33(1):37-41
    • Compared to non-JOURNEY II knees; Based on BCS evidence
  4. 1Short-term Range of Motion is Increased after TKA with an asymmetric bicruciatestabilized implant.AcceptedPoster Presentation, AAOS 2018 New Orleans. Kaitlin M. Carroll, Peter K. Sculco, Brian CMichaels,RichardL. Murphy, Seth A, Jerabek, David J. Mayman
  5. 2J Orthop. 2017 Jan 7;14(1):201- 206. doi: 10.1016/j.jor.2016.12.005. eCollection 2017. Bi-cruciate substituting total knee arthroplasty improved medio-lateral instability in mid-flexion range
  6.  In Vivo Kinematic Comparison of a Bicruciate Stabilized Total Knee Arthroplasty and the Normal Knee Using Fluoroscopy Trevor F. Grieco, MS a, *, Adrija Sharma, PhD a, Garett M. Dessinger, BS a, Harold E. Cates, MD b, Richard D. Komistek, PhD. The Journal of Arthroplasty, September 2017
  7. Testing concluded at 45 million cycles, ISO 14242-1 and 14243-3 define test completion at 5 million cycles. The results of laboratory wear simulation testing have not been proven to predict actual joint durability and performance in people. A reduction in wear alone may not result in improved joint durability and performance because other factors, such as bone structure, can affect joint durability and performance and cause medical conditions that may result in the need for additional surgery. These other factors were not studied as part of the testing.
  8. Iriuchishima T, Ryu K. Bicruciate substituting total knee arthroplasty improves stair climbing ability when compared with cruciate-retain or posterior stabilizing total knee arthroplasty. Indian J Orthop. 2019. doi:10.4103/ortho.IJOrtho_392_18.
  9. Smith JR, Picard F, Lonner J, et al. The accuracy of a robotically-controlled freehand sculpting tool for unicondylar knee arthroplasty. Congress of the International Society of Biomechanics. August 4-9, 2013. Natal, Brazil.
  10. Zardiackas, Lyle D., Kraay, Matthew J., Freese, Howard L, editors. Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications ASTM special technical publication; 1471. Ann Arbor, MI: ASTM, Dec. 2005

Additional claim statements and support regarding Smith+Nephew implants and Robotics-assisted surgery

  • Implants that are built to last
  • LEGION◊CR Knee with VERILAST◊ technology was lab-tested for 45 million cycles (estimating 30 years of wear performance) and showed 81% less wear than similar 5-million cycle cobalt chrome implant.
    • Learn More
      • ISO 14243-3
      • VERILAST knee wear testing and results apply only to the VERILAST LEGION CR Primary Knee System only. Extended lab-testing for other VERILAST knee systems have not been performed. The results of laboratory wear simulation testing have not been proven to predict actual joint durability and performance in people. A reduction in wear alone may not result in improved joint durability and performance because other factors, such as bone structure, can affect joint durability and performance and cause medical conditions that may result in the need for additional surgery. These other factors were not studied as part of the testing.
  • Smith+Nephew implants may offer a more normal feeling knee
    • Based on JOURNEY◊ II BCS knee implant
    • Learn More
      • Verstaete MA, Van Onsem S, Zambianchi F, et al. Multi-centre evaluation of knee kinematics during different activities for anatomic total knee design. Poster presented at: 2nd World Arthroplasty Congress; 19-21 April, 2018; Rome, Italy.
      • Sharma A, Dessinger G, Cates H, Komistesk R. In vivo kinematic comparison for subjects having a bi-cruciate substituting TKA vs the normal knee. Poster presented at: 2nd World Arthroplasty Congress; 19-21 April, 2018; Rome, Italy.
      • Kosse NM, Heesterbeek PJC, Defoort KC, Wymenga AB, van Hellemondt GG. Improved maximal flexion after minor adaptations in implant design bicruciate-substituted total knee arthroplasty. Poster presented at 19th Congress of the European Federation of National Associations of Orthopaedics and Traumatology (EFORT); May 30 – June 1 2018; Barcelona, Spain.
  • 89% of patients were able to take the stairs again after surgery.
    • Based on JOURNEY◊ II BCS knee implant patients
      • Iriuchishima T and Ryu K. Bicruciate substituting total knee arthroplasty improves stair climbing ability when compared with cruciate-retain or posterior stabilizing total knee arthroplasty. Indian J Orthop. 2019. DOI:10.4103/ortho.IJOrtho_392_18
  • A robotics-assisted knee replacement with Smith+Nephew implants may get you back in the game six months sooner than traditional knee replacement surgery
    • Based on UKA patients
      • Canetti R, Batailler C, Bankhead C, Neyret P, Servien E, Lustig S. Faster return to sport after robotic-assisted lateral unicompartmental knee arthroplasty: a comparative study. Arch Orthop Trauma Surg. 2018;138(12):1765-1771
  • Over 90% of patients who had a Smith+Nephew knee replacement surgery returned to work within 6 months.
      • Harris AI, Luo TD, Lang JE, Kopjar B. Short-term safety and effectiveness of a second-generation motion-guided total knee system. Arthroplast Today. 2018;4:240–243. 1
  • Robotics-assisted surgery with Smith+Nephew implants may lead to a faster rehabilitation and shorter recovery time than traditional knee surgery when following your doctor’s recovery plan and physical therapy recommendations.
    • Claim 19 & 20 (PCS REC.015)
  • Due to its improved accuracy, Smith+Nephew robotics-assisted UKA has lower revision rates* compared to conventional techniques
    • Shown in clinical studies with follow-up of up to 5.5 years
      • Batailler C, White N, Ranaldi FM, Neyret P, Servien E, Lustig S. Improved implant position and lower revision rate with robotic-assisted unicompartmental knee arthroplasty. Knee Surg Sports Traumatol Arthrosc. 2019;27(4):1232-1240.
      • Battenberg AK, Netravali NA, Lonner JH. A novel handheld robotic-assisted system for unicompartmental knee arthroplasty: surgical technique and early survivorship. J Robot Surg. 2019;14(1):55-60.
      • Gregori A. 5 Yr Experience Semi Active Robotic Partial Knee Replacement: The Financial Impact. Poster presented at: SICOT;October, 2018; Montreal, Canada.
  • A study has shown Smith+Nephew robotic technology has demonstrated faster return to sport (4.2 vs 10.5 months) when compared to conventional techniques*
        • *n= 28 (n=11 robotic procedures), p<0.01
          • Canetti R, Batailler C, Bankhead C, Neyret P, Servien E, Lustig S. Faster return to sport after robotic-assisted lateral unicompartmental knee arthroplasty: a comparative study. Arch Orthop Trauma Surg. 2018;138(12):1765-1771
  • Robotics-assisted surgery with Smith+Nephew implants may help patient get discharged sooner
    • Study of UKA patients
      • Sephton BM, et al. EKS Arthroplasty Conference. May 2-3, 2019; Valencia, Spain.
      • Shearman AD, et al. EKS Arthroplasty Conference. May 2-3, 2019; Valencia, Spain.
  • Robotics-assisted surgery with Smith+Nephew implants may provide patients with a smoother recovery
    • Based on JOURNEY II family of implants
      • Mayman DJ, Patel AR, Carroll KM. Hospital Related Clinical and Economic Outcomes of a Bicruciate Knee System in Total Knee Arthroplasty Patients. Poster presented at: ISPOR Symposium; May 19-23, 2018; Baltimore, Maryland, USA.
  • Robotics-assisted surgery with Smith+Nephew implants may help patients regain function faster
      • Shearman AD, et al. EKS Arthroplasty Conference. May 2-3, 2019; Valencia, Spain.

Additional statements and support regarding Knee Replacement

  • More than 90% of people who have knee replacement surgery experience dramatic relief in knee pain and are better able to perform common activities.
    • Based on pre-surgical pain levels
      • American Academy of Orthopaedic Surgeon website, http://orthoinfo.aaos.org/topic.cfm
  • The majority of patients experience profound improvements in their physical activity after having knee replacement surgery.
    • Based on pre-surgical activity levels
      • Brandes M, et. al., “Changes in physical activity and health-related quality of life during the first year after total knee arthroplasty.” Clin Orthop Relat Res. 1991 Dec;(273):151-6. https://www.ncbi.nlm.nih.gov/pubmed/20981812 Accessed Wednesday, April 17, 2019